Method and system for controlling fuel cell vehicle

Abstract

A method and system for controlling a fuel cell vehicle are provided. The method includes determining, by a controller, a driving pattern of a driver based on driving information including acceleration and deceleration information. A condition for activation of an idling-stop of a fuel cell is then set based on the determined driving pattern and the fuel cell is stopped from generating electric energy when the condition for activation of the idling-stop is satisfied.

What is claimed is: 
     
       1. A method for controlling a fuel cell vehicle, comprising:
 determining, by a controller, a driving pattern of a driver based on driving information including acceleration and deceleration information; 
 setting, by the controller, a condition for activation of an idling-stop of a fuel cell based on the determined driving pattern; and 
 stopping, by the controller, the fuel cell from generating electric energy when the condition for activation of the idling-stop is satisfied, 
 wherein the determination of the driving pattern includes:
 obtaining, by the controller, an average of speed changes for acceleration driving or deceleration driving; 
 comparing, by the controller, the average with a first reference value that is preset and a second reference value that is less than the first reference value; and 
 determining, by the controller, that the driving pattern is a first driving pattern when the average is greater than the first reference value, and is a second driving pattern when the average is equal to or less than the first reference value and is greater than the second reference value. 
 
 
     
     
       2. The method for controlling a fuel cell vehicle according to  claim 1 , further comprising:
 determining, by the controller, that the driving pattern is a third driving pattern when the average is equal to or less than the second reference value. 
 
     
     
       3. The method for controlling a fuel cell vehicle according to  claim 1 , wherein the determination of the driving pattern includes:
 obtaining, by the controller, the average of absolute values of speed changes for acceleration and deceleration driving; 
 comparing, by the controller, the average of the absolute values of the speed changes with the first reference value that is preset by the controller; and 
 determining, by the controller, that the driving pattern is the first driving pattern when the average of the absolute values of the speed changes is greater than the first reference value. 
 
     
     
       4. The method for controlling a fuel cell vehicle according to  claim 3 , further comprising:
 comparing, by the controller, the average of the absolute values of the speed changes with the first reference value and the second reference value that is less than the first reference value; and 
 determining, by the controller, that the driving pattern is the first driving pattern when the average of the absolute values of the speed changes is greater than the first reference value, and is the second driving pattern when the average of the absolute values of the speed changes is equal to or less than the first reference value and is greater than the second reference value. 
 
     
     
       5. The method for controlling a fuel cell vehicle according to  claim 4 , further comprising:
 determining, by the controller, that the driving pattern is a third driving pattern when the average of the absolute values of the speed changes is equal to or less than the second reference value. 
 
     
     
       6. The method for controlling a fuel cell vehicle according to  claim 1 , further comprising:
 setting, by the controller, a plurality of state of charge (SOC) reference values and a plurality of required torque reference values for a respective driving pattern; and 
 setting, by the controller, a condition in which a current SOC of a battery in a vehicle is greater than an SOC reference value for the determined driving pattern and in which a current required torque is less than a required torque reference value for the determined driving pattern, as a condition for activation of an idling-stop. 
 
     
     
       7. The method for controlling a fuel cell vehicle according to  claim 1 , further comprising:
 setting, by the controller, a condition for deactivation of the idling-stop using the determined driving pattern; and 
 deactivating, by the controller, the idling-stop, thereby causing the fuel cell to generate electric energy when the condition for deactivation of the idling-stop is satisfied. 
 
     
     
       8. The method for controlling a fuel cell vehicle according to  claim 7 , further comprising:
 setting, by the controller, a plurality of state of charge (SOC) reference values that correspond to a plurality of driving patterns, 
 wherein the controller is configured to set a condition in which a current SOC value of a battery is less than an SOC reference value that correspond to the determined driving pattern, as the condition for deactivation of the idling-stop. 
 
     
     
       9. The method for controlling a fuel cell vehicle according to  claim 7 , further comprising:
 setting, by the controller, a plurality of required torque reference values that correspond to a plurality of driving patterns, 
 wherein the controller is configured to set a condition in which a current required torque of a vehicle is greater than a required torque reference value that correspond to the determined driving pattern, as the condition for deactivation of the idling-stop. 
 
     
     
       10. The method for controlling a fuel cell vehicle according to  claim 1 , further comprising:
 storing, by the controller, in a memory unit the determined driving pattern at the time of turning off an engine; 
 recognizing, by the controller, a restart of a vehicle by determining the driving pattern using driving information including acceleration information or deceleration information of the vehicle after an engine of the vehicle is turned off, then the engine of the vehicle is restarted, and the vehicle moves for a predetermined period of time; and 
 setting a restart by setting, by the controller, a condition for activation of the idling-stop of the vehicle, based on the driving pattern stored in the memory unit when the controller fails to determine the driving pattern in the recognition of the restart. 
 
     
     
       11. The method for controlling a fuel cell vehicle according to  claim 10 , further comprising:
 deleting, by the controller, the driving pattern stored in the memory unit through the storing of the driving pattern when the controller completes determination of the driving pattern, 
 wherein in the setting of the restart, the controller is configured to set the condition for activation of the idling-stop using the determined driving pattern in the recognition of the restart. 
 
     
     
       12. A system for controlling a fuel cell vehicle, comprising:
 an acceleration-and-deceleration information acquisition unit configured to acquire acceleration information and deceleration information of a vehicle; and 
 a controller configured to determine a driving of a driver pattern using the acquired acceleration information and deceleration information, set a condition for activation of an idling-stop of a fuel cell using the determined driving pattern, and stop a fuel cell from generating power when the condition for activation of the idling-stop is satisfied, 
 wherein the controller is further configured to:
 obtain an average of speed changes for acceleration driving or deceleration driving; 
 compare the average with a first reference value that is preset and a second reference value that is less than the first reference value; and 
 determine that the driving pattern is a first driving pattern when the average is greater than the first reference value, and is a second driving pattern when the average is equal to or less than the first reference value and is greater than the second reference value. 
 
 
     
     
       13. The system for controlling a fuel cell vehicle of  claim 12 , wherein the controller is further configured to:
 determine that the driving pattern is a third driving pattern when the average is equal to or less than the second reference value. 
 
     
     
       14. The system for controlling a fuel cell vehicle of  claim 12 , wherein the controller is further configured to:
 obtain the average of absolute values of speed changes for acceleration and deceleration driving; 
 compare the average of the absolute values of the speed changes with the first reference value that is preset by the controller; and 
 determine that the driving pattern is the first driving pattern when the average of the absolute values of the speed changes is greater than the first reference value.